Blow-off apparatus for steam-boilers



(No Model.) v

A. W. QUAOKENBUSH.

' BLOW OFF APPARATUS FOR STEAM BOILERS.

No. 397,565. Patented Feb. 12,v 1889.

lJNlTED Srarns Parniv'r @rrrcn.

ANDREW \V. QUAOKENBUSH, OF MOBERL'Y, MISSOURI.

BLQW-QFF APPARATUS FUR STEAM BOlLERS.

SPECIFICATION forming part of Letters Patent No. 397,565, dated February 12, 1889.

Application filed $eptember 6, 1888. Serial No. 284,734. (No model.) i

To aZZ whom it may concern.-

BUSH, a citizen of the United States, residing at Moberly, in the county of Randolph and State of Missouri, have invented certain new and useful Improvements in Blow-0ff Apparatus for Steam-Boilers, of which the following is a specification.

The object of my said invention is to provide an apparatus by which mud or other sediment may be blown off from steam-boilers, which shall be simple and inexpensive in construction and quickly and easily operated. This object is accomplished by providing at the bottom of the boiler a perforated pipe, preferably extending its entire length, and which (in the case of boilers constructed in that manner) may extend through the waterspace around the fire-box, and from. there to the outside, where it is discharged into a drum, which should be provided with cones of wirenetting or perforated metal to retard or break the force of the sediment, water, and steam while blowing off, so as not to injure the machinery and paint with which it might otherwise come in contact.

Referring to the accompanying drawings, which are made a part hereof, and on which similar letters of reference indicate similar parts, Figure 1 is a central longitudinal vertical section of a locomotive the boiler of which is provided with a blow-off apparatus embodying my said invention; Fig. 2, a transverse sectional viewof a fragment of the shell of the boiler and the blow-off pipe, showing the relative position of these parts; Fig. 3, an

under side plan of the blow-oft pipe and the drum with which it connects separately 5 and Fig. a a sectional view of said drum, 011 an enlarged scale, similar to a portion of Fig. 1.

In said drawings the portions marked A represent the boiler of a locomotive; B, the fire-box thereto; C, the perforated pipes, and D the drum.

The locomotive, so far as it is represented, isshown simply for the purpose of illustrating how my improved blow-off apparatus is used in connection therewith. Being in itself no part of my present invention, but little more than outlines are given in the drawings,

and it will not be further described herein, except incidentally in describing the invention.

The pipe 0 should extend substantially the whole length of the boiler, as shown, and in case of locomotive and other boilers of like construction itshould also extend around the water-space surrounding the fire-box B. It has numerous perforations, c, (of any shape desireth) preferably arranged in two rows, and on the under side of the pipe, said perforations being thus at somewhat of an angle with a perpendicular line. The pipe extends to the outsidein therear of the fire-box, where it is provided with a blow oft cock, 0, by

opening which the person in charge of the boiler is enabled to blow-off all the mud or other sediment and impure water which may have collected in the boiler, and which, when this cool; is opened, are forced inside the pipe through the perforations by the pressure in said boiler.

As the pressure in the boiler is usuallyconsiderable, and the sediment, water, and steam would thus, if no retarding device was employed, be discharged from the pipe with con siderable force, I have provided a drum or trap, D, into which the discharging end of the pipe (J extends. This drum has a number of partitions, (1, extending through it, preferably in the form of cones,as shown, and made of wirenetting or perforated metal, and these effectually break the force of the discharge, so that the machinery or painted portions which may be in proximity thereto shall not be marred or injured thereby.

Having thus fully described my said invention, what I claim as new, and-desire to secure by Letters Patent, is-

1. The combination of a steam-boiler, a perforated pipe extending inside said boiler, a blow-off cock, and a retarding drum or trap secured at the discharging end of said pipe.

2. The combination, with a blow-off pipe extending inside of a boiler, of a retarding drum or trap consisting of a shell and a number of perforated partitions inside said shell, substantially as set forth.

'3. The combination, with a blow-off pipe, of a retarding drum or trap secured to its discharging end and provided with inclined or cone-shaped partitions for breaking the force of the discharge, substantially as shown and described.

4. The combination of a steam boiler, a blow-011' pipe extending along the bottom and inside of said boiler, provided with perfora tions which enter it at an angle with a verti cal line, a bloW-oiif cock inserted in the discharging end of said pipe outside of said boiler, and adruln or trap secured to said discharging end and containing angular or coneshaped partitions, all substantially as set forth.

In Witness whereof I have hereunto set my hand and sea], at Moberly, Missouri, this 1st day of. September, A. I). 1888.

WILLIAM FIRTH, CHARLES E. RoDEs. 

